Synchronizing system



INVENTOR v ALDER E CONNERY Filed Dec. 24, 1931 ATTO RNEY each other. h Telegraph systems such as that herein Patented May 23, 1933 UNITEDi SIT AT ES PATENT OFFICE MUNICATiONS ranoaacroams. me, or NEWARK, New JERSEY, A CORPORATiON YSYNCHRONIZING. team Application filed teams 24, 1931. Serial no. 583,002.

My invention. relates to phase correction of two remotely disposed rotating'members, and more particularly to synchronous telegraph or signalling system'sa 1 remotely disposed members lII fPlMLSE Wlth illustrated and described comprise rotating distributors remotely disposed with respect to each other r and connected by a signalling conductor in which is disposed a polarized relay responsive .to signals from the a transmitting'station. Systems of this type have distributors which operate atslightly different speeds,one of the distributors, usual- .ly that at the receiving station, being periodically corrected to synchronism with the other The signals transmitted are com posed of spacing or positive impulsesand marking or negatlve impulses p p a A Thecorrector mechanism comprises control relays initially controlled the" operation otthe polarized relay when responding to ,the ireceived impulses. These control reany period tributor.

during the rotation of the dis- .ot aa, ot aetr ay fiiiveriaoft will be point d (min; the descript on to anew;

y Referringto tliejdrawing:

A drive shaft tor the distributor driven by; means not shown carries afly wheel 50 and a freely rotating brush carrier 47, The

1 brush carrier has i a gearwheel. 48 formed integraltherewithylwhich meshes with a pin- 39 securdfQtQFt i l oi't shaft which is .j ou rnalle'd in} a I control disc operatively securedto shaft/K5 by anyi suitable means such as ,pin{42 The lother end of the shaft has a. star wheel secured the eto which is prevented from rotating by a .'spring actuated detentj :roller. 49 carried ,control .disc 41. Mountedupon .theshaft and rotatable areiltwo card I discs 1 C1 and C2, theformercontrolling contacts and 13. and the latter controlling contacts 22 and 23. 1 a

. A polarized line. relaywis shown at 2.

The tongueof relay 2 follows thereceived:

line signals. .When the tongue of relay 2 is resting against its spacing contact S,the

condenser 3 will be dischargedthrough resistance .4. Then. a marking signal a is received, theitongu'e of, relay 2 will move .over to the marking contact M and the condenser 3 will be charged from battery 5. The

charging current for. condenser 3 will flow through windings oflocking relay 6. If thebrush i is in properphase relation with.

the receivedsignals, then brush 7 i will be on thence through solid ring 10 to ground. It should be noted thatthe charging impulse goes, through windingsS and 9 in series and v that thesewi-ndings are. connected in :oppolays are then controlled insequence by. cams associated w ith the distributor mechanism. The co operation betweenthe control relays and the cams eliminates these-called fdead spotlso correction can take place at sition.- "Since windingsS and 9 have an equal number of turns, it will be apparent that the armature 11 of relay 6 willnot be operated. ,The? resistance of windings 8; and 9 however, limits the charging current of condenser 3 and thereby preventsdamage to the contactsof relay 2 orthetdistributor segments and brushes. When the brush 7 is out of phase with theireceived signal, the

brush will ,be on the A segment at theinstant that the tongue of relay 2; arrives at its marl cing contact.

The patl ,of the charging impulse conand thence to ground. ISincethe charging current, in this Cease, passes througlnonly one. wind ng of lockmmrel ay 6, thearmature 11 will be attracted and thelrelay will t sh wn, an the mrfil l fr mgr l y tends to operate locking relay 6. A locking circuit will be completed from positive battery 28, tongue 31, contact 30, winding 11 to ground through either of two circuits; one of these circuits is through the contacts 22 and 23 of cam C2, the other circuit through the contacts 25 and'19 of differential relay 27. Relay 27 and corrector magnet GM will not at present be operated. Later on in. the revolution of the distributor, cam C1 Wlll operate its contacts and complete a circuit from ground, through contacts 12 and 13, contact 14, tongue 15, winding '16 of relay 27, and to positive battery. There will be no circuit through winding 17 since relay 6 is locked up and, therefore, relay 27 will operate. Tongue 15 of'relay 27 is arranged so that it will touch its front contact 18 before it leaves its back contact 14, and will lock itself up through its front contact 18. hen relay 27' operated its right hand tongue 19 closed a circuit from ground, through front contact 20, winding of corrector magnet CM and battery 21 to ground,

thus energizing the corrector magnet which, in turn, places pin .13 in the path of the star wheel 46, which thus effects thecorrection. Shortly after the correction is made cam C2 will open its contacts .22 and 23, thereby ole-energizing locking winding '11 of rclay 6, and that relay will fall back to its normal position. Later onin the revolution of the distributor, cam C1, will close contacts 12 and 13 and. current will flow through winding 17 of relay 27, and this winding will neutralize the locking winding 16 and, therefore, the armatures of this relay will fall back to their unoperated positions. As long as contacts 12 and 13 are closed and the tongue 31 of locking revlay 6 is restored to its back contact 24, the

currents in windings 16 and 17'will neutral-- ize each other. It will be apparent that the moment at which relay 27 'is operated and unoperated is determined by the closure'of contacts 12 and 13, which are controlled by cam C1. Corrector magnet CM, therefore,

will be energized for a; complete revolution of the distributor. It' will be noticed that a circuit to ground from winding 11 ofrelay 6 can be made through contacts22 and 28, and also through contact 25 and tongue 19 of relay 27. The purpose of having this additionalpath to ground through the contacts ofrelay 27 is to prevent the relay 6 from becoming unresponsive to correcting will remain continuously operated during the several revolutions of the distributor. It has been previously mentioned that the cams C1 and C2 are disposed on the shaft so that cam C1 operates its contacts, and shortly after..'this cam- G2 operates its contacts. This occurs every revolution. In this circuit it is not possible for correction to occur on two successive revolutions if the correcting. impulses .happen to occur during the brief interval which elapses between the time cams Cl and C2 operate their contacts. The following will describe the operation of this circuit when two successive correction impulses occur on two successive revolutions shortly after cam G1 has operated its contacts, but before cam G2 has operated its contacts. When cam C1 closes contacts 12 and 13" relays 6' and 27 arein of'relay 27, and since these two windings neutralize each other relay 27 will be unoperated; Assume now that the condenser discharge from the impulse relay 2 now tends to operate relay'6. Relay 6 will lock itself up through the following circuit: battery28, tongue 31, contact 30, looking winding 11, contact 25,"and tongue 19 to'ground.

Cam C2 Wlll now open its contacts 22 and as momentarily, but this will not unlock 'reiay 6 since this locking circuit ismain- "tamed through contacts 25 and tongue 19.

Cum G1 now closes contacts 12 and 13 and .currentnow flows through winding 16 only,

of relay 27. 'Relay'27' operates and locks itself up through its tongue 15 and contact 18. The operation of relay 27 in turn energizes co'rrecto'r magnet CM, and the pin 5 willengage with starwheel 6 and correct the distributor.

Now assume'that the discharge from impulse of relay 2 again tends "to operate locking relay 6.* Locking relay 6 is already locked'up and, therefore, this correcting'impulse' has no effect on it.

When the camC2 again opens its contacts '22 and 23 locking relay 6 will be de-energizedsince it does not now have thealternative circult through contact 25 and tongue 19; When'the cam C1 again closes itsvcon-" tacts 12 and 13, differential relay'27 will be de-eliergized,' and this in turn will deenergize cor-rector magnet CM. There is a distinct advantage in having double corrections prevented during the" interval between the operation of cams C1 and G2, because many of the correcting impulses which tend to operate relay 6 at'that time are'fa'lse. The reason for this .'is, th at it takes a short time for the mechanical displacement. be-

tween the brushes and the driving member of the distributor to occur, and if this shifting'action has been initiated but not completed, the distributor will be apparently out of phase although it is at the time'being brought into phase. By suitably posi tioning cams C1 and C2 with respect to the engagement of star. wheel 6 with correcting pins 5 it is possible to eliminate these unnecessary double corrections.

From the above description it will be apparent that this invention eliminates the tendency for unnecessary double corrections to occur and, furthermore, it eliminates the so-called deadspot or position in which the circuit isunresponsive to the correcting impulse.

WVhat is claimed is:

1. In a periodically synchronized telegraph system, )the combination of a distributor comprising a rotating contactor and driving means therefor, a corrector magnet for adjusting the angular displacement of said contac-tor in relation to said driving means, means for conditioning said corrector magnet for operation at any time in a revolution of said driving means, and means for operating said corrector magnet at a fixed point in a revolution of said driving means.

2. A system for phasing two remotely located rotating bodiesycomprising driving means for each of said bodies, one of said driving means operating at a greater speed than the other, means for transmitting signals at a speed proportional to said slower driving means speed, a corrector magnet conditioned for operation whenever said rotating bodies are a predetermined amount but of phase, a cam for causing operation of said corrector magnet at a fixed point in the cycle of said faster driving means, and mechanical means operated by said correctormagnet to cause retardation of said faster rotating body in respect to its driv ing means.

3. In a periodically synchronized telegraph system, the combination of a rotating distributor, a phase correcting mechanism therefor, means for operating said correcting mechanism at a fixed point in a distributor revolution, means for maintaining said correcting mechanism operated during a complete revolution of said distributor, and mechanical means for initiating correction of said distributor during said revolution.

4:. In a telegraph system, the combination of a periodically phased rotating distributor, a corrector mechanism therefor, means for operating said corrector mechanism at a fixed point ina distributor revolution, means for normally maintaining said corrector mechanism operable during a complete revolution of said distributor, mechanical means for initiating correction of said distributor during said revolution, said mechanical means possessing inherent lag, and means for preventing said corrector mechanism from again operating prior to the rotation of said distributor to another fixed point desaid lag. i

termined in" accordance with theamount of 5.In a telegraph system, in combination with a "dlstributor C-OIHPIISIDg rotatlng brushes adapted to bephase corrected, a corrector magnet, means comprising a cam and contactsoperable therebyto cause energization of i said corrector magnet and subsequent de-energization of said corrector magnet after said brusheshave been phase corrected', andcircuit meansfor causing reenergization of said corrector magnet when saidperiod of energlzat on 1s insufilcient to effect necessary correction.

GMA phase correction system for tele-- graph systems, comprising adistributor having rotating brushes and a driving means therefor, a differential relayoperable when correction is needed, a second differsaid first relay, cam controlled means operable at a fixed point in a rotation of said driving means to operate said second relay, a corrector magnet operated by said second relay to effect correction of said brushes in having rotating brushes and a driving means therefor, a differential relay operable when correctlon 1s needed, a second differential relay conditioned for operation by said first relay, cam controlled means operable at a fixed point in a rotation of said driving means to operate said second relay, a corrector magnet operated by said second relay to effect correction of said brushes in respect to said driving means, a second cam conential relay conditioned for operation by trolled means operable at a second fixed" point in said distributor cycle to effect deenergization of said first relay, means comprising said first cam to normally de-energize said second relay and corrector magnet after a complete revolution of said driving means, and a circuit connection between said first and second relays to prevent de-energization of said first relay at said second fixed point and consequently de-energizm tion of said second relay at the completion of a revolution when further correction is necessary.

8. A phase correction system for telegraph systems comprising a distributor-haw ing rotating brushes and a driving means therefor, a differential means operable when correction is needed, a corrector magnet condltloned for operatlon by operation of said relay, cam controlled means operable at a fixed point in a rotation of said driving" means to operate said magnet to effect correction of said brushes in respect to said driving means and upon the succeeding operation thereof to effect de-energization of i said corrector magnet, a second cam controlled means operable at a second fixed point in said distributor cycle to efiect. deenergization of the relay in the event that the corrector magnet is at that time operated, and circuit means effective When said relay operates in that portion of the distributor cycle lying between said first and said second cam controlled means to maintain-said relay operated until the second operation of said second cam controlled means following the said operatlon of said relay.

In witness whereof, I hereunto subscrlbe my name this 23rd day of December 1931.

' ALDER F.- CQNNERY. 

